Carbon Dioxide Capture Equipment

Abstract

To provide a technique for suppressing clogging due to granular fillers.SOLUTION: A carbon dioxide recovery device capable of recovering carbon dioxide contained in a gas comprises a granular filler, a reaction vessel, and at least one support plate. The interior of the reaction vessel is filled with the granular filler for absorbing carbon dioxide, and the gas passes through the interior of the vessel. At least one support plate is located in the reaction vessel, and supports the granular filler. At least one support plate has a plurality of vent holes through which the gass passes, and a plurality of protrusions which protrude from at least one support plate. The plurality of protrusions are arranged in a zigzag pattern.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present disclosure relates to carbon dioxide capture devices. [Background technology]

[0002] Patent Document 1 discloses a support structure that uses a flat partition plate with numerous slit holes through which gas passes to support granular filler packed in a packed tube for separating or reacting components in a gas. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2004-255270 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-mentioned flat partition plate, when granular filler is placed on the slit holes, the granular filler is likely to block the slit holes, resulting in the problem of clogging of the partition plate by the granular filler.

[0005] An object of one aspect of the present disclosure is to provide a technique for suppressing clogging caused by granular filler. [Means for solving the problem]

[0006] One aspect of the present disclosure is a carbon dioxide capture device capable of capturing carbon dioxide contained in a gas, comprising a granular filler, a reaction vessel, and at least one support plate. The granular filler absorbs carbon dioxide. The reaction vessel is filled with the granular filler, and gas passes through the inside. The at least one support plate is disposed within the reaction vessel and supports the granular filler. The at least one support plate has a plurality of ventilation holes and a plurality of protrusions. Gas passes through the plurality of ventilation holes. The plurality of protrusions protrude from the at least one support plate and are arranged in a staggered pattern.

[0007] In such a configuration, the support plate has a three-dimensional shape due to the multiple convex parts. The multiple convex parts are arranged in a staggered pattern. Therefore, the granular filler is likely to remain on the multiple convex parts, and the position where the granular filler is stable on the support plate so as to abut against the three convex parts is easily controlled by the three convex parts arranged in a triangular shape among the multiple convex parts. As a result, compared to, for example, a flat support plate that does not have multiple convex parts, gaps are likely to occur between the granular filler and the support plate, so that the multiple air holes of the support plate are less likely to be blocked. Therefore, clogging of the support plate by the granular filler can be suppressed. As a result, the gas contact of the granular filler is likely to be improved, and a decrease in the utilization rate of the granular filler can be suppressed.

[0008] In one embodiment of the present disclosure, the plurality of ventilation holes may be arranged in the plurality of protrusions and in a flat portion of at least one support plate where the plurality of protrusions are not formed. According to this configuration, the ventilation holes are arranged at various positions among the ventilation holes formed in the plurality of protrusions and the ventilation holes formed in the flat portion, so that even when the granular filler is supported by the support plate, it is possible to facilitate the flow of gas through at least one of the ventilation holes at various positions.

[0009] In one embodiment of the present disclosure, the plurality of protrusions may be arranged at intervals such that, when the granular filler is supported by the three protrusions arranged in a triangular shape, a gap is formed between the granular filler and a flat portion, which is a portion of at least one support plate where the plurality of protrusions are not formed. According to this configuration, when the granular filler is supported by the three protrusions arranged in a triangular shape, a gap is formed between the flat portion and the granular filler, so that at least the ventilation holes formed in the flat portion are less likely to be blocked.

[0010] In one embodiment of the present disclosure, the at least one support plate may be a plurality of support plates arranged to divide the interior of the reaction vessel into a plurality of chambers aligned along the gas flow direction. The granular filler may be filled into each of the plurality of chambers. According to this configuration, the granular filler is supported by each of the plurality of support plates, so that the weight of the granular filler filled in the reaction vessel can be distributed by the plurality of support plates.

[0011] In one embodiment of the present disclosure, the granular filler may be substantially spherical. In such a configuration, since the granular filler is substantially spherical, gaps are more likely to be formed when the granular filler contacts the multiple convex portions and when the granular fillers contact each other, compared to, for example, rod-shaped granular fillers. Therefore, it is easy to obtain the effect of suppressing clogging of the multiple ventilation holes by the granular filler and maintaining ventilation even when the filling density of the granular filler is high. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a schematic diagram of a carbon dioxide capture device. [Diagram 2] FIG. 2 is a cross-sectional view showing a schematic view of a tank filled with granular filler. [Diagram 3] FIG. 3A is a schematic perspective view of a support plate, and FIG. 3B is a schematic top view of a case in which the protrusions are arranged so that the diameter of the air hole is smaller than the diameter of an imaginary circle formed by connecting three points on the junctions between the flat surfaces of three protrusions arranged in a triangular shape. [Figure 4]Figure 4A is an oblique view showing a schematic state in which granular filler is supported by the support plate shown in Figure 3A, and Figure 4B is a top view showing a schematic state in which granular filler is placed on top of the convex portion arranged as shown in Figure 3B. [Diagram 5] Figure 5A is a top view showing a schematic diagram of a granular filler being supported by the support plate shown in Figure 3A, Figure 5B is a schematic cross-sectional view taken along line VB-VB in Figure 5A, and Figure 5C is a schematic cross-sectional view taken along line VC-VC in Figure 5A. [Figure 6] FIG. 2 is a top view showing a schematic diagram of a support plate having a triangular pyramidal convex portion. [Figure 7] FIG. 7 is a top view showing a schematic diagram of a state in which granular filler is supported by the support plate shown in FIG. 6. [Figure 8] 13 is a diagram showing a schematic configuration in which ventilation holes are arranged on the side surface of a protrusion. FIG. [Figure 9] FIG. 13 is a diagram illustrating a configuration in which a vent hole is disposed between two adjacent protrusions. [Figure 10] FIG. 2 is a cross-sectional view showing a schematic diagram of a tank arranged sideways so that the central axis of the reaction vessel extends horizontally. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, exemplary embodiments of the present disclosure will be described with reference to the drawings. [1. Configuration] The carbon dioxide capture device 100 shown in Fig. 1 is a device for capturing and storing carbon dioxide in a combustion exhaust gas generated from an internal combustion engine such as a generator. The carbon dioxide capture device 100 can be used in various devices that generate combustion exhaust gas. The carbon dioxide capture device 100 includes a plurality of tanks 10 filled with granular filler 5 that absorbs carbon dioxide contained in the combustion exhaust gas. The granular filler 5 that absorbs carbon dioxide may be, for example, a granular solid that supports a liquid carbon dioxide absorbent of a compound that bonds with carbon dioxide, such as an amine, or may be a material formed into granules from a material that adsorbs carbon dioxide, such as activated carbon or zeolite.

[0014] In the carbon dioxide capture device 100, carbon dioxide is captured from the combustion exhaust gas through an absorption process, and then the absorbed carbon dioxide is desorbed through a desorption process and stored in a storage tank. In the absorption step, as shown by the dotted line A1 in Fig. 1, the combustion exhaust gas G is introduced into the tank 10, and the combustion exhaust gas G is passed through the granular filler 5 to absorb the carbon dioxide in the combustion exhaust gas G. The treated exhaust gas after absorbing the carbon dioxide is discharged to the outside.

[0015] In the desorption step, the granular filler 5 is heated by a heating device (not shown), while carbon dioxide is desorbed from the granular filler 5 by a carrier gas such as water vapor introduced from the carrier gas outlet 20 into the tank 10 and a pump 30, as indicated by a dotted line A2 in Fig. 1. The desorbed carbon dioxide is stored in a storage tank (not shown). Since the pressure in the tank 10 decreases during the desorption step, outside air is taken in to return the pressure in the tank 10 to its original value after the desorption step, and the granular filler 5 is cooled by a cooling device (not shown) to the temperature that should be reached in the absorption step.

[0016] As shown in FIG. 2, the tank 10 includes a reaction vessel 1, an outer shell 2, a support plate 3, a sub-support plate 4, and a granular filler 5. The reaction vessel 1 is a cylindrical vessel in which the granular filler 5 is filled. In this embodiment, the term "filled" includes not only a state in which the granular filler 5 is filled to the fullest in the reaction vessel 1, but also a state in which the granular filler 5 is filled in the reaction vessel 1 with gaps and the granular filler 5 is piled up on the support plate 3 described later. The reaction vessel 1 has an inlet 11 and an outlet 12 for the combustion exhaust gas G so that the combustion exhaust gas G passes through the inside. In this embodiment, the inlet 11 and the outlet 12 are arranged along the central axis A of the reaction vessel 1, and are provided so that the cross-sectional area perpendicular to the central axis A direction is smaller than that of the reaction vessel 1. In this embodiment, the reaction vessel 1 is arranged vertically so that the central axis A extends in the vertical direction, the inlet 11 is located below the reaction vessel 1, and the outlet 12 is located above the reaction vessel 1. As a result, the combustion exhaust gas G passes through the reaction vessel 1 from the bottom to the top. The combustion exhaust gas G may be configured to pass through the reaction vessel 1 from the top to the bottom.

[0017] The outer shell 2 is disposed so as to surround a part of the outer periphery of the reaction vessel 1, and both end portions in the direction of the central axis A are welded and fixed to the outer periphery of the reaction vessel 1 so as to form a space between the reaction vessel 1 and the outer shell 2. That is, the tank 10 has a double-tube structure including the reaction vessel 1 and the outer shell 2. In the following description, the wall of the reaction vessel 1 covered by the outer shell 2 is referred to as the inner wall 13. In the tank 10 with the double-tube structure, a granular filler 5 is disposed in the area of ​​the reaction vessel 1 covered by the outer shell 2.

[0018] The support plate 3 and the sub-support plate 4 are plate-shaped members disposed in the reaction vessel 1. In this embodiment, three support plates 3 and one sub-support plate 4 are disposed in the reaction vessel 1. The three support plates 3 and one sub-support plate 4 are disposed at predetermined intervals along the flow direction of the combustion exhaust gas G, i.e., the central axis A of the reaction vessel 1, so as to be perpendicular to the central axis A and to be aligned parallel to each other. In other words, the three support plates 3 and one sub-support plate 4 are disposed so as to extend horizontally, respectively, so as to divide the inside of the reaction vessel 1 into a plurality of rooms aligned along the flow direction of the combustion exhaust gas G, i.e., the central axis A. The one sub-support plate 4 is disposed on the most downstream side in the flow direction of the combustion exhaust gas G, and in this embodiment, at the top. The tank 10 does not need to be provided with the sub-support plate 4.

[0019] The support plate 3 and the sub-support plate 4 have a flat plane portion 31 and a holding portion 32 provided on the edge of the plane portion 31. The holding portion 32 is formed to be thicker than the plane portion 31. The support plate 3 and the sub-support plate 4 are fixed to the reaction vessel 1 by disposing the holding portion 32 between the inner wall portion 13 and the outer shell portion 2 of the reaction vessel 1.

[0020] For example, the tank 10 may be formed by arranging the support plate 3 and the sub-support plate 4, in which the holding portion 32 and the flat portion 31 are integrally formed, between the respective parts of the reaction vessel 1 having a plurality of parts, and welding and fixing them in a combined state, and then welding and fixing the outer shell portion 2 to the reaction vessel 1 so as to cover the holding portion 32. Also, for example, the flat portion and the holding portion may be separate parts. In that case, the flat portion may be penetrated into each of the holes of the reaction vessel having a plurality of holes formed in the inner wall portion, and then a holding portion larger than the plurality of holes is attached to the edge of the flat portion from the outside of the reaction vessel, and then the outer shell portion 2 is welded and fixed to the reaction vessel 1 so as to cover the holding portion 32, thereby fixing the support plate and the sub-support plate to the reaction vessel. Also, the inner wall portion of the reaction vessel and the flat portion and holding portion of the support plate and the sub-support plate may be formed integrally.

[0021] The granular filler 5 is filled in each of the multiple chambers in the reaction vessel 1 so as to be supported by each of the three support plates 3. In this embodiment, the support of the granular filler 5 includes not only a state in which the granular filler 5 is supported from below by the support plates 3, but also a state in which the granular filler 5 is supported from the side by, for example, sandwiching the granular filler 5 between the two support plates 3. In this embodiment, the granular filler 5 is approximately spherical.

[0022] 3A to 5C, the support plate 3 further has a plurality of protrusions 33 and a plurality of ventilation holes 34. It should be noted that the sub-support plate 4 only has a plurality of ventilation holes 34. The multiple protrusions 33 are provided so as to protrude from the support plate 3. Specifically, the multiple protrusions 33 are provided so as to protrude from the upper surface of the support plate 3, i.e., the surface of the support plate 3 facing the downstream side with respect to the flow direction of the combustion exhaust gas G. In the following description, a portion of the support plate 3 on which the multiple protrusions 33 are not formed is referred to as a flat portion 31.

[0023] In this embodiment, the plurality of protrusions 33 have a hemispherical shape. As shown in Fig. 5B, the diameter d1 of each protrusion 33 is equal to or smaller than the diameter d2 of the granular filler 5. As shown in FIG. 3A and FIG. 4A, the plurality of protrusions 33 are arranged in a staggered manner. In the present disclosure, the staggered arrangement means the following arrangement. That is, the plurality of protrusions 33 have a plurality of protrusion rows formed by protrusions arranged in a straight line along the X direction indicated by the arrow in FIG. 3A of the support plate 3 along the Y direction intersecting with the X direction, and the protrusions 33 are arranged alternately in adjacent protrusion rows among the plurality of protrusion rows. That is, the plurality of protrusions 33 are arranged alternately in each of the protrusions 33 arranged along a predetermined direction. In this embodiment, the vertices of three protrusions 33 arranged in a triangular shape among the plurality of protrusions 33 arranged in a staggered manner are arranged to form an equilateral triangle. Note that the vertices of three protrusions 33 arranged in a triangular shape may be arranged to form an isosceles triangle.

[0024] 5A to 5C, the multiple protrusions 33 are arranged at intervals such that, with the granular filler 5 supported by the three protrusions 33 arranged in a triangular shape, there is a gap S1 between the flat surface portion 31 and the granular filler 5 as shown in Fig. 5C. For example, the multiple protrusions 33 are arranged at intervals such that the diameter d3 of an imaginary circle C shown in Fig. 3B formed by connecting the three points on the junctions between the flat surface portion 31 and the three protrusions 33 on the lowest slopes of the three protrusions 33 arranged in a triangular shape, in other words, the three points on the junctions between the three protrusions 33 and the flat surface portion 31, is smaller than the diameter d2 of the granular filler 5.

[0025] The multiple ventilation holes 34 are formed in the support plate 3 and the sub-support plate 4, and are circular through-holes that penetrate the support plate 3 and the sub-support plate 4. The diameter d4 of the multiple ventilation holes 34 is equal to or smaller than the diameter d2 of the granular filler 5 so that the granular filler 5 does not fall out of the multiple ventilation holes 34.

[0026] As shown in FIGS. 3A to 4B, the multiple ventilation holes 34 formed in the support plate 3 are arranged in the multiple protrusions 33. In this embodiment, the multiple ventilation holes 34 are arranged at the vertices of the multiple protrusions 33. Furthermore, the multiple ventilation holes 34 formed in the support plate 3 are also arranged in the flat surface portion 31 of the support plate 3. In this embodiment, the multiple ventilation holes 34 are arranged between three protrusions 33 arranged in a triangular shape on the flat surface portion 31 of the support plate 3, specifically, in the center of a virtual triangle formed by connecting the vertices of the three protrusions 33.

[0027] As shown in FIG. 5A to FIG. 5C, the first layer of the granular filler 5 is placed on the support plate 3 so that there is a gap S1 between the granular filler 5 and the flat portion 31. The second layer of the granular filler 5 placed thereon is easily supported by the three granular fillers 5 of the first layer arranged in a triangular shape so that there is a gap S2 shown in FIG. 5B between the convex portion 33 and the granular filler 5 of the second layer. That is, in the support plate 3 of this embodiment, the granular filler 5 is easily arranged in a face-centered cubic lattice shape. Therefore, even when the granular filler 5 is supported on the support plate 3 in a state where the packing density is high, the air permeability can be improved through the gaps S1 and S2. As a result, the combustion exhaust gas G easily passes through the multiple ventilation holes 34, and clogging of the support plate 3 by the granular filler 5 is suppressed. In addition, since the combustion exhaust gas G that has passed through the multiple ventilation holes 34 can easily pass between the stacked granular filler 5, the contact of the granular filler 5 with the combustion exhaust gas G is easily improved, and a decrease in the utilization rate of the granular filler 5 is suppressed.

[0028] [2. Effects] According to the embodiment described above in detail, the following effects can be obtained. (2a) In this embodiment, the support plate 3 has a three-dimensional shape due to a plurality of protrusions 33 protruding from the flat surface 31 of the support plate 3. The plurality of protrusions 33 are arranged in a staggered pattern, and a plurality of ventilation holes 34 are arranged at the apexes of the plurality of protrusions 33 and at the flat surface 31 of the support plate 3. For this reason, the granular filler 5 can be easily placed on the plurality of protrusions 33, and the position of the granular filler 5 on the support plate 3 at which the granular filler 5 is placed can be easily controlled by three of the plurality of protrusions 33 arranged in a triangular shape so that the granular filler 5 abuts against the side surfaces of the three protrusions 33.

[0029] Furthermore, the multiple protrusions 33 are arranged at intervals such that, with the granular filler 5 supported by three protrusions 33 arranged in a triangular shape, there is a gap S1 between the flat surface 31 and the granular filler 5. As a result, the first layer of granular filler 5 placed on the support plate 3 is supported by the support plate 3 such that there is a gap S1 between the flat surface 31, and the second layer of granular filler 5 placed further above that is easily supported by the support plate 3 such that there is a gap S2 between the protrusions 33.

[0030] Therefore, even when the granular filler 5 is placed on the support plate 3, the combustion exhaust gas G easily passes through the gap S1 from the plurality of ventilation holes 34 arranged in the flat portion 31, and the combustion exhaust gas G easily passes through the gap S2 from the plurality of ventilation holes 34 arranged in the plurality of protruding portions 33. As a result, the plurality of ventilation holes 34 of the support plate 3 are less likely to be blocked, so clogging of the support plate 3 by the granular filler 5 can be suppressed. In other words, even when the granular filler 5 is supported on the support plate 3 with a high packing density, the ventilation can be improved through the gaps S1 and S2. In addition, the combustion exhaust gas G that has passed through the plurality of ventilation holes 34 easily passes between the piled up granular filler 5, so that the contact of the granular filler 5 with the combustion exhaust gas G is easily improved, and the reduction in the utilization rate of the granular filler 5 can be suppressed.

[0031] (2b) In this embodiment, the three support plates 3 are arranged so as to divide the interior of the reaction vessel 1 arranged vertically into a number of rooms aligned along the central axis A. Therefore, the granular filler 5 can be supported from below by each of the three support plates 3, and the weight of the granular filler 5 filled in the reaction vessel 1 can be distributed by the three support plates 3. This makes it possible to prevent the granular filler 5 on the lower side from cracking due to its own weight, even when the reaction vessel 1 is filled with the granular filler 5 at a high density.

[0032] (2c) In this embodiment, since the granular filler 5 is substantially spherical, gaps are more likely to be formed when the granular filler 5 comes into contact with the multiple protrusions 33 and when the granular filler 5 comes into contact with each other, compared to, for example, rod-shaped granular filler. Therefore, clogging of the multiple ventilation holes 34 by the granular filler 5 is suppressed, and the effect of maintaining ventilation even when the filling density of the granular filler 5 is high is easily obtained.

[0033] (2d) In this embodiment, the inlet 11 and the outlet 12 in the reaction vessel 1 are arranged along the central axis A of the reaction vessel 1. Therefore, it is possible to reduce bias in the flow of the combustion exhaust gas G compared to a configuration in which the inlet 11 and the outlet 12 are not arranged along the central axis A. In addition, it is easier to control the flow of the combustion exhaust gas G passing through the support plate 3.

[0034] (2e) In this embodiment, the tank 10 has a double-tube structure including the reaction vessel 1 and the outer shell 2, so that it is less susceptible to the heat influence from the outside. In addition, in this embodiment, the granular filler 5 is disposed in the area of ​​the reaction vessel 1 covered by the outer shell 2, so that the temperature of the tank 10 for the absorption process and desorption process carried out in the tank 10 can be easily controlled.

[0035] 3. Other embodiments Although the embodiments of the present disclosure have been described above, it goes without saying that the present disclosure is not limited to the above-described embodiments and can take various forms.

[0036] (3a) In the above embodiment, a configuration in which multiple hemispherical projections 33 are provided on the support plate 3 is illustrated, but the shape of the projections is not limited thereto. For example, the multiple projections 33a may have a triangular pyramid shape as in the support plate 3a shown in Figs. 6 and 7. The multiple projections 33a are arranged in a staggered pattern. The support plate 3a has multiple ventilation holes 34a arranged on the flat surface portion 31a, and the multiple ventilation holes 34a are arranged in a range surrounded by three of the multiple projections 33a. Although not illustrated, the multiple ventilation holes 34a may be arranged at the apexes of the multiple projections 33a or on any side of the triangular pyramid. In the case of the configuration of the support plate 3a, as shown in Fig. 7, the granular filler 5 is supported by three protrusions 33a arranged in a triangular shape so as to have gaps between the support plate 3a and the three granular fillers 5 arranged in a triangular shape support a second layer of granular filler 5 placed on top of the three granular fillers 5 arranged in a triangular shape so as to have gaps between the protrusions 33a and the three granular fillers. Therefore, the same effect as that of the support plate 3 of the above-mentioned embodiment can be obtained.

[0037] (3b) In the above embodiment, a configuration in which the plurality of ventilation holes 34 are arranged in the plurality of protrusions 33 and the flat surface 31 of the support plate 3 is illustrated, but the arrangement of the plurality of ventilation holes is not limited to this. For example, the plurality of ventilation holes may be arranged in only one of the plurality of protrusions or the flat surface of the support plate.

[0038] (3c) In the above embodiment, the ventilation hole 34 arranged in the convex portion 33 is arranged at the apex of the convex portion 33, but the position of the ventilation hole in the convex portion is not limited to this. For example, as in the ventilation hole 34b shown in FIG. 8, the ventilation hole 34 may be arranged on a surface other than the apex of the convex portion 33b, that is, on a side surface. Note that in the convex portion 33b, in addition to the ventilation hole 34 arranged at the apex of the convex portion 33b, the ventilation hole 34b arranged on the side surface of the convex portion 33b may be arranged. Also, in the convex portion 33b, only the ventilation hole 34b arranged on the side surface of the convex portion 33b may be arranged. Also, the ventilation hole may be a shape other than a circle, for example, the ventilation hole may be a square shape.

[0039] (3d) In the above embodiment, the configuration in which the ventilation holes 34 arranged on the planar portion 31 of the support plate 3 are arranged between the three protruding portions 33 arranged in a triangular shape is exemplified, but the position of the ventilation holes on the planar portion is not limited to this. For example, like the ventilation hole 34c shown in FIG. 9, the ventilation hole 34 may be arranged between two adjacent protruding portions 33c. In addition to the ventilation holes 34 arranged between the three protruding portions 33 arranged in a triangular shape on the planar portion 31, the ventilation hole 34c may be arranged between two adjacent protruding portions 33c. Also, only the ventilation holes 34c arranged between the two adjacent protruding portions 33c may be arranged on the planar portion 31.

[0040] (3e) In the above embodiment, the reaction vessel 1 is arranged vertically so that the central axis A of the reaction vessel 1 extends vertically, but the orientation in which the reaction vessel is arranged is not limited to this. For example, as in the tank 10d shown in FIG. 10, the reaction vessel 1d may be arranged horizontally so that the central axis Ad of the reaction vessel 1d extends horizontally. As a result, the combustion exhaust gas G passes through the reaction vessel 1d along the left-right direction. In the reaction vessel 1d arranged horizontally in this manner, a plurality of convex portions 33 are provided so as to protrude from the surface of the support plate 3 arranged in the reaction vessel 1d facing downstream with respect to the flow direction of the combustion exhaust gas G, that is, from the right side surface in the example shown in FIG. 10. That is, in the above embodiment, the configuration in which the granular filler 5 is supported from below by the support plate 3 is exemplified, but the method of supporting the granular filler is not limited to this. For example, the granular filler 5 may be supported laterally by the support plate 3 arranged in the reaction vessel 1d arranged horizontally as described above.

[0041] (3f) In the above embodiment, the inlet 11 and the outlet 12 are configured to be arranged along the central axis A of the reaction vessel 1, but the inlet and outlet in the reaction vessel do not have to be arranged along the central axis A of the reaction vessel.

[0042] (3g) In the above embodiment, the tank 10 has a double-pipe structure including the reaction vessel 1 and the outer shell 2, but the tank does not have to have a double-pipe structure. (3h) In the above embodiment, a configuration in which three support plates 3 are arranged in the reaction vessel 1 is exemplified, but the number of support plates arranged in the reaction vessel 1 is not limited to this. For example, one, two, or four or more support plates may be arranged.

[0043] (3i) In the above embodiment, the granular filler 5 has a substantially spherical shape, but the shape of the granular filler is not limited to this. The granular filler may have various shapes. (3j) The function of one component in the above embodiments may be distributed among multiple components, or the functions of multiple components may be integrated into one component. In addition, a part of the configuration of the above embodiments may be omitted. In addition, at least a part of the configuration of the above embodiments may be added to or substituted for the configuration of another of the above embodiments. Note that all aspects included in the technical idea identified from the wording of the claims are embodiments of the present disclosure. [Explanation of symbols]

[0044] 1,1d...reaction vessel, 2...outer shell, 3,3a...support plate, 4...sub-support plate, 5...granular filler, 10,10d...tank, 11...inlet, 12...outlet, 13...inner wall, 20...carrier gas outlet, 30...pump, 31,31a...flat portion, 32...holding portion, 33,33a-33c...convex portion, 34,34a-34c...ventilation hole, 100...carbon dioxide capture device, A,Ad...central axis, A1,A2...dotted line, C...imaginary circle, G...combustion exhaust gas, S1,S2...gap.

Claims

1. A carbon dioxide capture device capable of capturing carbon dioxide contained in a gas, A granular filler that absorbs carbon dioxide; a reaction vessel filled with the granular filler and through which a gas passes; At least one support plate disposed within the reaction vessel and supporting the granular filler; Equipped with The at least one support plate has a plurality of ventilation holes through which gas passes and a plurality of protrusions protruding from the at least one support plate, The plurality of protrusions are arranged in a staggered pattern, A carbon dioxide capture device in which the multiple convex portions are arranged at intervals such that there is a gap between the granular filler and a flat portion of the at least one support plate where the multiple convex portions are not formed, with the granular filler supported by three convex portions arranged in a triangular shape.

2. The carbon dioxide capture device according to claim 1, The carbon dioxide capture device, wherein the plurality of air holes are arranged in the plurality of convex portions and in a flat portion of the at least one support plate that is a portion where the plurality of convex portions are not formed.

3. The carbon dioxide capture device according to claim 1 or 2, The at least one support plate is a plurality of support plates arranged so as to divide the inside of the reaction vessel into a plurality of chambers arranged along a gas flow direction, The carbon dioxide capture apparatus, wherein the granular filler is filled into each of the plurality of chambers.

4. The carbon dioxide capture device according to any one of claims 1 to 3, The carbon dioxide capture device, wherein the granular filler is substantially spherical.

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